FIDO2 and W3C WebAuthn Standard
FIDO2 (Fast IDentity Online) comprises the W3C Web Authentication (WebAuthn) specification and the FIDO Alliance Client-to-Authenticator Protocol (CTAP). WebAuthn Level 3 (2025) enables passwordless authentication using public key cryptography.
Domains
Security and Privacy Requirements
Attestation and Trust
Authenticator Requirements (CTAP2)
Authentication Ceremony
Registration Ceremony
Frequently Asked Questions
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